<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
    var obj1 = {name: 'jak',age:18};
    var obj2 = {sex:'男'};

    //需要 希望 obj2 继承obj1的 属性和方法
    for (var k in obj1) {
        obj2[k] = obj1[k];
    }
    console.log(obj2);
    </script>
</body>
</html>